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Security audit

SumUp

Security checks for vulnerabilities and agentic risk

Overview

This SumUp skill is purpose-aligned and clearly scoped, though users should be cautious with its one-time CLI installer and any write or destructive SumUp actions.

Install only if you are comfortable using OOMOL as the broker for your SumUp connection. Verify the oo CLI installation source before running the one-time installer, and require a clear payload, target, and approval before any create, update, or deactivate action.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (2)

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The skill instructs users to install software via a remote script piped directly to a shell, which executes code fetched over the network without prior verification. If the distribution endpoint, transport, or upstream content is compromised, this can lead to arbitrary code execution on the host running the command.

Content

Scanner excerpt · SKILL.md (reported line 62)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The description says to use this skill for ANY SumUp request, including read, write, update, and delete operations. That broad trigger increases the chance an agent will invoke this skill automatically for sensitive or destructive tasks without narrowing scope or enforcing stronger preconditions, which is especially risky because the skill includes state-changing actions.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.